Our hybrid engined saloon returned an impressive 59.6mpg, ahead of the Mercedes C300 Hybrid, and diesel rivals from Audi and BMW.
What Car? gathers its True MPG’ figures in a different way to the official MPG fuel economy figures, which are based on government laboratory test figures.
A team of What Car? technicians record a vehicle’s combined economy in real-world driving conditions.
14 executive models have been tested by What Car? and the IS came out tops. What Car? described the IS 300h as a ‘compelling company car option’, said it was cheaper to run than diesel rivals for business users and commented that Lexus has a reputation for excellent reliability and dealer service.
The IS 300h has a 2.5litre, 178bhp petrol engine combined with an electric motor. The system, known as Lexus Hybrid Drive, delivers CO2 emissions from as low as 99g/km.